Tireburnin

iTrader: (42)

My drive train setup is a th400 to custom driveshaft to a ford 9 inch with a strange aluminum center section. The u joint is smaller on the rear end side than the transmission side. When I pulled out my driveshaft I found a problem with the rear end side u-joint. The caps that go into the 9 inch yolk had shifted during a pass and popped off when I removed the shaft. One cap stayed somewhat stuck in the yolk do to the angle it had wedged at. The two caps on the driveshaft side at the rear end were undamaged and still in place.

What causes the caps or driveshaft to shift? How do I fix the u joint? Is there some sort of clip that holds the u joint caps on and in place? Does it need to be fixed or do I just slide the caps back on and bolt it in with the u bolts?

AFASTYZFR1

iTrader: (55)

i think you can just slide the caps back on....make sure they are greased properly


re-read.....sounds like you have the wrong u-joint

CW00BlackTA

iTrader: (31)

There should be some tabs on your yoke that hold the caps in place (keep them from sliding off the u-joint). If you don't have the tabs, is there a groove in there for a C-clip? There has to be one or the other. Otherwise you'll have to get special straps to retain the caps.

Tireburnin

iTrader: (42)

thanks for the advice. I am going to snap a pic tomorrow for reference to the caps.

roy

Sounds like you have a 1350 yoke on the center section. If so you will need a corresponding ujoint to fit your drivline and the yoke.

CW00BlackTA

iTrader: (31)

Roy's right about that. You have to have the right u-joint first. The caps should fit snuggly in the yoke. NAPA sells a conversion u-joint.

Tireburnin

iTrader: (42)

Here are a couple of pictures of the caps and U-joint. How do I tell if it is a 1350 yolk and a smaller u-joint?

roy

Your u-joint looks toasted.
Check here to see what type of joint and yoke you have. It involves a little measuring.

Tireburnin

iTrader: (42)

Thanks for the link. I will measure it tonight and buy a new one.

I'm guessing I had the wrong ujoint/yolk combo.

Tireburnin

iTrader: (42)

I got everything measured and it appears I have a 1330 joint in a 1350 yolk. I couldn't get a very good measurement on the yolk.

The joint caps are 3.62 apart and 1.125 diameter. The caps aren't a perfect glove like fit in the yolk, so I am going to order up a 1350 conversion joint which is a 1.18 diameter. If it is too big, I'll just go ahead and get another 1330 and stick it in.